Model: refact data/datetype fields

[etj]

The ResourceBase model at the moment handles the two date fields (related to data, not to metadata):

• date
• date_type (creation|revision|publication)

Since CSW ISO AP defines "CreationDate", "RevisionDate", "PublicationDate" as queriables, we may replace the fields date and date_type with:

• csw_data_creation_date
• csw_data_revision_date
• csw_data_publication_date

where

• csw because they are only used in CSW output
• data because they refer to data, and not to the metadata document (there are other fields for that purpose)

The migration should populate the new fields using the date and date_type fields:

• if date_type=='creation' --> set csw_data_creation_date = date
• if date_type=='revision' --> set csw_data_revision_date = date
• if date_type=='publication' --> set csw_data_publication_date = date

Once the migrations are done,

• change the pyCSW mappings to point to the new fields
• change the ISO XML template to use the new fields

[gannebamm]

I do not understand why the publication and revision also should set other fields. Did I misunderstand your post?

Why should the creation and revision date be set to the publication date? For me this seems semantically incorrect.

[etj]

@gannebamm oky, I was badly recalling some directives, I updated the doc of the migration part to only keep the pre-existing data without any forcing.